Fir For Being Polar Opposite

A newly married man comes to the police station to file an FIR against his wife. He claims that they are polar opposites and can not see eye to eye. He also reveals that his father-in-law was in the wrong as he claimed that his daughter has a very adjusting nature. The wife is called for further investigation. They are questioned to check for their compatibility. Next, the in-laws are called for questioning. How will the inspector save this family?